US' 18-year-old singer Billie Eilish's 'Bad Guy' has been named 'Song of the Year' at the Grammy Awards. It was Ellish's second Grammy win after winning the award for 'Best Pop Vocal Album' for 'When We All Fall Asleep, Where Do We Go?' Billie's brother Finneas O'Connell co-wrote the 'Bad Guy' and produced it.